Yes, I have seen that in the same kind of car you picture. I think that there are holes in the frame, and certainly in the plastic interior assembly, for long screws to be inserted. But if they had been, they’d be visible squarely in the two side windows at the end of the car. That is the only reason I can think of why they were not installed at the factory.
On another thread about these cars, someone posted that they had worked out the length and diameter of the (metric) screws needed for the purpose of using the mounts in the roof of the car. I have thought about affixing a piece of something, probably plastic, at the base of the car body that shorter screws could be drilled into. Have not got around to trying that.
Meanwhile, you can always put in some ultra-sticky double sided tape . . .
P.S. Here’s the thread where this was discussed: https://ogrforum.ogaugerr.com/...54#80410241313147254
The screw measurement was 3 mm diameter x 60 mm length.
